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Wyszukujesz frazę "Sobolewski, R. K." wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Assessment of Ground Ozone Level under the Physiological Strain Conditions
Autorzy:
Sobolewski, R. K.
Kalbarczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/123691.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
air pollution
thermal strain
bioclimate
urban climate
Opis:
Urban areas are characterised by the impact of negative environmental factors, such as: stress connected with extreme bio-thermal conditions or the presence of high concentrations of air pollutants. This study aims to evaluate the relationship between the hours of O3 concentrations and the levels of physiological strain (PhS) in Legnica, during the period from December 2013 to November 2014. The hourly concentrations of O3, NO2 and meteorological elements used in the study were obtained from the State Environmental Monitoring station in Legnica (Lower Silesia). The evaluation of the bio-thermal conditions was carried out by means of the physiological strain indicator (PhS). The basic statistics were subject to analysis, the frequency of hourly pollution concentrations and the thermal strain were evaluated, as was the Pearson correlation coefficient and multiple regression between O3 and PhS. A detailed analysis was carried out for the summer months (June-August). The most adverse conditions in terms of pollution with tropospheric ozone and heat strain were noted in July. The strongest relations between O3 and PhS were observed in June. In winter months (December-February) no significant dependencies were noted between the tested variables. These tests will help to contribute to increasing the current knowledge on evaluating the thermal comfort of urbanised areas and the accompanying aero-sanitary conditions.
Źródło:
Journal of Ecological Engineering; 2018, 19, 4; 207-216
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrathin NbN Films for Superconducting Single-Photon Detectors
Autorzy:
Słysz, W.
Guziewicz, M.
Borysiewicz, M.
Domagała, J.
Pasternak, I.
Hejduk, K.
Rzodkiewicz, W.
Ratajczak, J.
Bar, J.
Węgrzecki, M.
Grabiec, P.
Grodecki, R.
Węgrzecka, I.
Sobolewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1504147.pdf
Data publikacji:
2011-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.62.Bf
74.78.-w
81.15.Cd
81.15.Jj
Opis:
We present our research on fabrication and structural and transport characterization of ultrathin superconducting NbN layers deposited on both single-crystal $Al_2O_3$ and Si wafers, and $SiO_2$ and $Si_3N_4$ buffer layers grown directly on Si wafers. The thicknesses of our films varied from 6 nm to 50 nm and they were grown using reactive RF magnetron sputtering on substrates maintained at the temperature 850°C. We have performed extensive morphology characterization of our films using the X-ray diffraction method and atomic force microscopy, and related the results to the type of the substrate used for the film deposition. Our transport measurements showed that even the thinnest, 6 nm thick NbN films had the superconducting critical temperature of 10-12 K, which was increased to 14 K for thicker films.
Źródło:
Acta Physica Polonica A; 2011, 120, 1; 200-203
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Hotspot Formation in Nanostructured Superconducting Stripes Excited with Single Photons
Autorzy:
Jukna, A.
Kitaygorsky, J.
Pan, D.
Cross, A.
Perlman, A.
Komissarov, I.
Sobolewski, R.
Okunev, O.
Smirnov, K.
Korneev, A.
Chulkova, G.
Milostnaya, I.
Voronov, B.
Gol'tsman, G.
Powiązania:
https://bibliotekanauki.pl/articles/1813380.pdf
Data publikacji:
2008-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.25.Fy
74.25.Sv
74.45.+c
Opis:
Dynamics of a resistive hotspot formation by near-infrared-wavelength single photons in nanowire-type superconducting NbN stripes was investigated. Numerical simulations of ultrafast thermalization of photon-excited nonequilibrium quasiparticles, their multiplication and out-diffusion from a site of the photon absorption demonstrate that 1.55 μm wavelength photons create in an ultrathin, two-dimensional superconducting film a resistive hotspot with the diameter which depends on the photon energy, and the nanowire temperature and biasing conditions. Our hotspot model indicates that under the subcritical current bias of the 2D stripe, the electric field penetrates the superconductor at the hotspot boundary, leading to suppression of the stripe superconducting properties and accelerated development of a voltage transient across the stripe.
Źródło:
Acta Physica Polonica A; 2008, 113, 3; 955-958
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technology of Ultrathin NbN and NbTiN Films for Superconducting Photodetectors
Autorzy:
Guziewicz, M.
Slysz, W.
Borysiewicz, M.
Kruszka, R.
Sidor, Z.
Juchniewicz, M.
Golaszewska, K.
Domagala, J.
Rzodkiewicz, W.
Ratajczak, J.
Bar, J.
Wegrzecki, M.
Sobolewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/1492719.pdf
Data publikacji:
2011-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.62.Bf
74.78.-w
81.15.Cd
81.15.Jj
Opis:
We report fabrication and characterization of ultrathin NbN and NbTiN films designed for superconducting photodetectors. Our NbN and NbTiN films were deposited on $Al_2O_3$ and Si single-crystal wafers by a high-temperature, reactive magnetron sputtering method and, subsequently, annealed at 1000°C. The best, 18 nm thick NbN films deposited on sapphire exhibited the critical temperature of 15.0 K and the critical current density as high as ≈ 8 × $10^6$ A/$cm^2$ at 4.8 K.
Źródło:
Acta Physica Polonica A; 2011, 120, 6A; A-076-A-079
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problems With Determination of Fugitive Emission of Polycyclic Aromatic Hydrocarbons from Coke Oven Battery
Autorzy:
Bigda, R.
Sobolewski, A.
Telenga-Kopyczyńska, J.
Słowik, K.
Powiązania:
https://bibliotekanauki.pl/articles/125466.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
coke oven battery
industrial emission
fugitive emission
PAHs
coking plant
Opis:
Coke oven battery is a complex and multifaceted facility in terms of air pollutant emissions. As far as stack or quenching tower does not cause major difficulties of emission measurement, the fugitive emission measurement from such sources as battery top elements (charging holes, ascension pipes) or oven doors is still complicated and not fully solved problem. This article presents the discussion concerning main problems and errors likely to be made in particular stages of procedure of fugitive emissions characterization from coke oven battery (selection of sampling points, sampling itself, measurement of air velocity over battery top and laboratory analyses). In addition, results of concentrations measurements of selected substances characteristic for the coking process (naphthalene, anthracene, 4 PAHs and TSP) originating from fugitive sources of coke oven battery and subjected to reporting under the E-PRTR are presented. The measurements were carried out on a coke oven battery top in points selected on the basis of the preceding detailed air convection velocity measurements over the battery top. The results of the velocity measurements were compared with results of numerical modelling using CFD software. The presented material is an attempt to cross-sectional presentation of issues related to the quantitative evaluation of fugitive emission from coke oven battery, discussed on the example of PAHs emission as a group of substances characteristic for coking of coal.
Źródło:
Journal of Ecological Engineering; 2017, 18, 2; 136-149
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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